PRODUCTS AND SPECIFICATIONS DISCUSSED HEREIN ARE SUBJECT TO CHANGE BY MICRON WITHOUT NOTICE

8Mb Smart 5 Boot Block Flash Memory

Micron Technology, Inc. Reserves the right to change products or specifications without notice.

MT28F800B5_3.fm - Rev. 3, Pub. 8/2002

8Mb

SMART 5 BOOT BLOCK FLASH MEMORY

FLASH MEMORY

MT28F008B5
MT28F800B5

5V Only, Dual Supply (Smart 5)
0.18µm Process Technology

FEATURES

· Eleven erase blocks:

16KB/8K-word boot block (protected)
Two 8KB/4K-word parameter blocks

· Eight main memory blocks
· Smart 5 technology (B5):

5V ±10% V

application/

production programming

· Advanced 0.18µm CMOS floating-gate process
· Compatible with 0.3µm Smart 5 device
· Address access time: 80ns
· 100,000 ERASE cycles
· Industry-standard pinouts
· Automated write and erase algorithm
· Two-cycle WRITE/ERASE sequence
· TSOP and SOP packaging options
· Byte- or word-wide READ and WRITE

(MT28F800B5, 1 Meg x 8/512K x 16)

Notes:

1. This generation of devices does not support 12V V

compatibility production programming; however, 5V
V

application production programming can be used

with no loss of performance.

2. Contact factory for availability.

Part Number Example:

MT28F800B5WG-8 BET

GENERAL DESCRIPTION

The MT28F008B5 (x8) and MT28F800B5 (x16/x8)

are nonvolatile, electrically block-erasable (Flash),
programmable read-only memories containing
8,388,608 bits organized as 524,288 words (16 bits) or
1,048,576 bytes (8 bits). Writing or erasing the device is
done with a 5V V

voltage, while all operations are

performed with a 5V V

. Due to process technology

advances, 5V V

is optimal for application and pro-

duction programming. These devices are fabricated
with Micron's advanced 0.18µm CMOS floating-gate
process.

The MT28F008B5 and MT28F800B5 are organized

into eleven separately erasable blocks. To ensure that
critical firmware is protected from accidental erasure
or overwrite, the devices feature a hardware-protected
boot block. This block may be used to store code
implemented in low-level system recovery. The
remaining blocks vary in density and are written and
erased with no additional security measures.

Please refer to Micron's Web site (

www.micron.com/

flash

) for the latest data sheet.

OPTIONS

MARKING

· Timing

80ns

-8

· Configurations

1 Meg x 8

MT28F008B5

512K x 16/1 Meg x 8

MT28F800B5

· Boot Block Starting Word Address

Top

Bottom

· Operating Temperature Range

Commercial (0ºC to +70ºC)

None

Extended (-40ºC to +85ºC)

· Packages

MT28F008B5
Plastic 40-pin TSOP Type I

(10mm x 29mm)

MT28F800B5
Plastic 48-pin TSOP Type I

(12mm x 20mm)

Plastic 44-pin SOP (600 mil)

40-Pin TSOP Type I

44-Pin SOP

48-Pin TSOP Type I

8Mb

SMART 5 BOOT BLOCK FLASH MEMORY

8Mb Smart 5 Boot Block Flash Memory

Micron Technology, Inc. Reserves the right to change products or specifications without notice.

MT28F800B5_3.fm - Rev. 3, Pub. 8/2002

Pin Assignment (Top View)

48-Pin TSOP Type I

Order Number and Part Marking
MT28F800B5WG-8 B
MT28F800B5WG-8 T
MT28F800B5WG-8 BET
MT28F800B5WG-8 TET

44-PIN SOP

Order Number and Part Marking
MT28F800B5SG-8 B
MT28F800B5SG-8 T
MT28F800B5SG-8 BET
MT28F800B5SG-8 TET

40-Pin TSOP Type I

Order Number and Part Marking
MT28F008B5VG-8 B
MT28F008B5VG-8 T
MT28F008B5VG-8 BET
MT28F008B5VG-8 TET

Notes: 1. Contact factory for availability.

A15
A14
A13
A12
A11
A10

A9
A8

NC
NC

WE#

RP#

WP#

A18
A17

A7
A6
A5
A4
A3
A2
A1

A16

BYTE#
V

DQ15/(A - 1)
DQ7
DQ14
DQ6
DQ13
DQ5
DQ12
DQ4

DQ11
DQ3
DQ10
DQ2
DQ9
DQ1
DQ8
DQ0

OE#
V

CE#

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24

48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25

A18

A17

CE#

OE#

DQ0

DQ8

DQ1

DQ9

DQ2

DQ10

DQ3

DQ11

RP#

WE#

A10

A11

A12

A13

A14

A15

A16

BYTE#

DQ15/(A - 1)

DQ7

DQ14

DQ6

DQ13

DQ5

DQ12

DQ4

A16
A15
A14
A13
A12
A11

A9
A8

WE#

RP#

WP#

A18

A7
A6
A5
A4
A3
A2
A1

A17

A19
A10

DQ7
DQ6
DQ5
DQ4

DQ3
DQ2
DQ1
DQ0

OE#
V

CE#

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20

40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21

8Mb

SMART 5 BOOT BLOCK FLASH MEMORY

8Mb Smart 5 Boot Block Flash Memory

Micron Technology, Inc., reserves the right to change products or specifications without notice.

MT28F800B5_3.fm - Rev. 3, Pub. 8/2002

t
i
o

l
Bl

i
a

Note

s
not

pply

T28

00B

5SG

s
not

pply

T28

08B

16KB Boot Block

8KB Parameter Block

96KB Main Block

128KB Main Block

Y - Select Gates

Sense Amplifiers

Write/Erase-Bit

Compare and Verify

Addr.

Buffer/

Latch

Power

(Current)

Control

Addr.

Counter

Command

Execution

Logic

I/O

Control

Logic

Switch/

Pump

Status

Identification

Y -

Decoder

128KB Main Block

X - Decoder/Block Erase Control

Output

Buffer

Input

Buffer

State

Machine

BYTE#

A0-A18/(A19)

CE#

OE#

WE#

RP#

DQ15/(A - 1)

MUX

DQ15

DQ8-DQ14

DQ0-DQ7

19 (20)

A-1

(10)

Output

Buffer

Output

Buffer

Input

Buffer

Input

Buffer

Input Data

Latch/Mux

WP#

128KB Main Block

8Mb

SMART 5 BOOT BLOCK FLASH MEMORY

8Mb Smart 5 Boot Block Flash Memory

Micron Technology, Inc. Reserves the right to change products or specifications without notice.

MT28F800B5_3.fm - Rev. 3, Pub. 8/2002

PIN DESCRIPTIONS

44-PIN SOP

NUMBERS

40-PIN

TSOP

NUMBERS

48-PIN

TSOP

NUMBERS

SYMBOL

TYPE

DESCRIPTION

WE#

Input

Write Enable: Determines if a given cycle is a WRITE cycle.
If WE# is LOW, the cycle is either a WRITE to the command
execution logic (CEL) or to the memory array.

WP#

Input

Write Protect: Unlocks the boot block when HIGH if V

PPH

(5V) and RP# = V

during a WRITE or ERASE. Does

not affect WRITE or ERASE operation on other blocks.

CE#

Input

Chip Enable: Activates the device when LOW. When CE# is
HIGH, the device is disabled and goes into standby power
mode.

RP#

Input

Reset/Power-Down: When LOW, RP# clears the status
register, sets the internal state machine (ISM) to the array
read mode and places the device in deep power-down
mode. All inputs, including CE#, are "Don't Care," and all
outputs are High-Z. RP# unlocks the boot block and
overrides the condition of WP# when at V

; RP# must be

held at V

during all other modes of operation.

OE#

Input

Output Enable: Enables data output buffers when LOW.
When OE# is HIGH, the output buffers are disabled.

BYTE#

Input

Byte Enable: If BYTE# = HIGH, the upper byte is active
through DQ8DQ15. If BYTE# = LOW, DQ8DQ14 are High-
Z, and all data is accessed through DQ0DQ7. DQ15/(A - 1)
becomes the least significant address input.

11, 10, 9, 8,

7, 6, 5, 4,

42, 41, 40,
39, 38, 37,
36, 35, 34,

3, 2

21, 20, 19,
18, 17, 16,

15, 14, 8, 7,

36, 6, 5, 4,
3, 2, 1, 40,

13, 37

25, 24,

23,22, 21,

20, 19, 18,

8, 7, 6, 5, 4,

3, 2, 1, 48,

17, 16

A0A18/

(A19)

Input

Address Inputs: Select a unique 16-bit word or 8-bit byte.
The DQ15/(A - 1) input becomes the lowest order address
when BYTE# = LOW (MT28F800B5) to allow for a selection
of an 8-bit byte from the 1,048,576 available.

DQ15/

(A-1)

Input/

Output

Data I/O: MSB of data when BYTE# = HIGH.

Address Input: LSB of address input when BYTE# = LOW
during READ or WRITE operation.

15, 17, 19,
21, 24, 26,

28, 30

25-28, 32-35

29, 31, 33,
35, 38, 40,

42, 44

DQ0DQ7

Input/

Output

Data I/Os: Data output pins during any READ operation or
data input pins during a WRITE. These pins are used to
input commands to the CEL.

16, 18, 20,
22, 25, 27,

30, 32, 34,
36, 39, 41,

DQ8
DQ14

Input/

Output

Data I/Os: Data output pins during any READ operation or
data input pins during a WRITE when BYTE# = HIGH. These
pins are High-Z when BYTE# is LOW.

Supply

Write/Erase Supply Voltage: From a WRITE or ERASE
CONFIRM until completion of the WRITE or ERASE, VPP
must be at 5V. VPP = "Don't Care" during all other
operations.

30, 31

Supply

Power Supply: +5V ±10%.

13, 32

23, 39

27, 46

Supply

Ground.

29, 38

9, 10, 15

No Connect: These pins may be driven or left unconnected.

8Mb

SMART 5 BOOT BLOCK FLASH MEMORY

8Mb Smart 5 Boot Block Flash Memory

Micron Technology, Inc. Reserves the right to change products or specifications without notice.

MT28F800B5_3.fm - Rev. 3, Pub. 8/2002

Notes: 1. L = V

(LOW), H = V

(HIGH), X = V

or V

("Don't Care").

2. V

PPH

= 5V.

3. Operation must be preceded by ERASE SETUP command.
4. Operation must be preceded by WRITE SETUP command.
5. The READ ARRAY command must be issued before reading the array after writing or erasing.
6. When WP# = V

, RP# may be at V

or V

7. A1A8, A10A17 = V

8. Value reflects DQ8DQ15.

TRUTH TABLE (MT28F800B5)

FUNCTION

RP#

CE#

OE#

WE# WP#

BYTE#

DQ0

DQ7

DQ8

DQ14

DQ15/

A-1

Standby

High-Z

RESET

High-Z

READ

READ (word mode)

Data-Out

READ (byte mode)

Data-Out

High-Z

A-1

Output Disable

High-Z

WRITE/ERASE (EXCEPT BOOT BLOCK)

ERASE SETUP

20h

ERASE CONFIRM

PPH

D0h

WRITE SETUP

10h/40h

WRITE (word mode)

PPH

Data-In

WRITE (byte mode)

PPH

Data-In

A-1

READ ARRAY

FFh

WRITE/ERASE (BOOT BLOCK)

ERASE SETUP

20h

ERASE CONFIRM

PPH

D0h

ERASE CONFIRM

3, 6

PPH

D0h

WRITE SETUP

10h/40h

WRITE (word mode)

PPH

Data-In

WRITE (word mode)

4, 6

PPH

Data-In

WRITE (byte mode)

PPH

Data-In

A-1

WRITE (byte mode)

4, 6

PPH

Data-In

A-1

READ ARRAY

FFh

DEVICE IDENTIFICATION

Manufacturer
Compatibility (word
mode)

89h

00h

Manufacturer
Compatibility (byte
mode)

89h

High-Z

Device (word mode, top
boot)

9Ch

88h

Device (byte mode, top
boot)

9Ch

High-Z

Device (word mode,
bottom boot)

9Dh

88h

Device (byte mode,
bottom boot)

9Dh

High-Z

8Mb

SMART 5 BOOT BLOCK FLASH MEMORY

8Mb Smart 5 Boot Block Flash Memory

Micron Technology, Inc. Reserves the right to change products or specifications without notice.

MT28F800B5_3.fm - Rev. 3, Pub. 8/2002

Notes: 1. L = V

, H = V

, X = V

or V

2. V

PPH

= 5V.

, RP# may be at V

or V

7. A1A8, A10A19 = V

TRUTH TABLE (MT28F008B5)

FUNCTION

RP#

CE#

OE#

WE#

WP#

DQ0DQ7

Standby

High-Z

RESET

High-Z

READ

Data-Out

Output Disable

High-Z

WRITE/ERASE (EXCEPT BOOT BLOCK)

ERASE SETUP

20h

ERASE CONFIRM

PPH

D0h

WRITE SETUP

10h/40h

WRITE

PPH

Data-In

READ ARRAY

FFh

WRITE/ERASE (BOOT BLOCK)

ERASE SETUP

20h

ERASE CONFIRM

PPH

D0h

ERASE CONFIRM

3, 6

PPH

D0h

WRITE SETUP

10h/40h

WRITE

PPH

Data-In

WRITE

4, 6

PPH

Data-In

READ ARRAY

FFh

DEVICE IDENTIFICATION

Manufacturer Compatibility

89h

Device (top boot)

98h

Device (bottom boot)

99h

8Mb

SMART 5 BOOT BLOCK FLASH MEMORY

8Mb Smart 5 Boot Block Flash Memory

Micron Technology, Inc. Reserves the right to change products or specifications without notice.

MT28F800B5_3.fm - Rev. 3, Pub. 8/2002

FUNCTIONAL DESCRIPTION

The MT28F800B5 and MT28F008B5 Flash memo-

ries incorporate a number of features ideally suited for
system firmware. The memory array is segmented into
individual erase blocks. Each block may be erased
without affecting data stored in other blocks. These
memory blocks are read, written and erased with com-
mands to the command execution logic (CEL). The
CEL controls the operation of the internal state
machine (ISM), which completely controls all WRITE,
BLOCK ERASE, and VERIFY operations. The ISM pro-
tects each memory location from over-erasure and
optimizes each memory location for maximum data
retention. In addition, the ISM greatly simplifies the
control necessary for writing the device in-system or in
an external programmer.

The Functional Description provides detailed infor-

mation on the operation of the MT28F800B5 and
MT28F008B5 and is organized into these sections:

· Overview
· Memory Architecture
· Output (READ) Operations
· Input Operations
· Command Set
· ISM Status Register
· Command Execution
· Error Handling
· WRITE/ERASE Cycle Endurance
· Power Usage
· Power-Up

OVERVIEW
Smart 5 Technology (B5)

Smart 5 operation allows maximum flexibility for in-

system READ, WRITE and ERASE operations. WRITE
and ERASE operations may be executed with a V

voltage of 3.3V or 5V. Due to process technology
advances, 5V V

is optimal for application and pro-

duction programming. For any operation, V

is at 5V.

Eleven Independently Eraseable

Memory Blocks

The MT28F800B5 and MT28F008B5 are organized

into eleven independently erasable memory blocks
that allow portions of the memory to be erased with-
out affecting the rest of the memory data. A special
boot block is hardware-protected against inadvertent
erasure or writing by requiring either a super-voltage
on the RP# pin or driving the WP# pin HIGH. (The WP#
pin does not apply to the SOP package.) One of these
two conditions must exist, along with the V

voltage

(5V) on the V

pin, before a WRITE or ERASE is per-

formed on the boot block. The remaining blocks
require that only the V

voltage be present on the V

pin before writing or erasing.

Hardware-Protected Boot Block

This block of the memory array can be erased or

written only when the RP# pin is taken to V

or when

the WP# pin is brought HIGH. (The WP# pin does not
apply to the SOP package.) This provides additional
security for the core firmware during in-system firm-
ware updates should an unintentional power fluctua-
tion or system reset occur. The MT28F800B5 and
MT28F008B5 are available with the boot block starting
at the bottom of the address space ("B" suffix) or the
top of the address space ("T" suffix).

Selectable Bus Size (MT28F800B5)

The MT28F800B5 allows selection of an 8-bit (1 Meg

x 8) or 16-bit (512K x 16) data bus for reading and writ-
ing the memory. The BYTE# pin is used to select the
bus width. In the x16 configuration, control data is
read or written only on the lower 8 bits (DQ0DQ7).

Data written to the memory array utilizes all active

data pins for the selected configuration. When the x8
configuration is selected, data is written in byte form;
when the x16 configuration is selected, data is written
in word form.

Internal State Machine (ISM)

BLOCK ERASE and BYTE/WORD WRITE timing are

simplified with an ISM that controls all erase and write
algorithms in the memory array. The ISM ensures pro-
tection against over-erasure and optimizes write mar-
gin to each cell.

During WRITE operations, the ISM automatically

increments and monitors WRITE attempts, verifies
write margin on each memory cell and updates the
ISM status register. When BLOCK ERASE is performed,
the ISM automatically overwrites the entire addressed
block (eliminates over-erasure), increments and moni-
tors ERASE attempts, and sets bits in the ISM status
register.

ISM Status Register

The ISM status register enables an external proces-

sor to monitor the status of the ISM during WRITE and
ERASE operations. Two bits of the 8-bit status register
are set and cleared entirely by the ISM. These bits indi-
cate whether the ISM is busy with an ERASE or WRITE
task and when an erase has been suspended. Addi-

8Mb

SMART 5 BOOT BLOCK FLASH MEMORY

8Mb Smart 5 Boot Block Flash Memory

Micron Technology, Inc. Reserves the right to change products or specifications without notice.

MT28F800B5_3.fm - Rev. 3, Pub. 8/2002

tional error information is set in three other bits: V

status, write status, and erase status.

Command Execution Cell (CEL)

The CEL receives and interprets commands to the

device. These commands control the operation of the
ISM and the read path (i.e., memory array, ID register
or status register). Commands may be issued to the
CEL while the ISM is active. However, there are restric-
tions on what commands are allowed in this condition.
See the Command Execution section for more detail.

Deep Power-Down Mode

To allow for maximum power conservation, the

MT28F800B5 and MT28F008B5 feature a very low cur-
rent, deep power-down mode. To enter this mode, the
RP# pin is taken to V

±0.2V. In this mode, the current

draw is a maximum of 20µA. Entering deep power-
down also clears the status register and sets the ISM to
the read array mode.

MEMORY ARCHITECTURE

The MT28F800B5 and MT28F008B5 memory array

architecture is designed to allow sections to be erased
without disturbing the rest of the array. The array is
divided into eleven addressable blocks that vary in size
and are independently erasable. When blocks rather
than the entire array are erased, total device endur-
ance is enhanced, as is system flexibility. Only the

ERASE function is block-oriented. All READ and
WRITE operations are done on a random-access basis.

The boot block is protected from unintentional

ERASE or WRITE with a hardware protection circuit
which requires that a super-voltage be applied to RP#
or that the WP# pin be driven HIGH before erasure is
commenced. The boot block is intended for the core
firmware required for basic system functionality. The
remaining ten blocks do not require that either of
these two conditions be met before WRITE or ERASE
operations.

Boot Block

The hardware-protected boot block provides extra

security for the most sensitive portions of the firm-
ware. This 16KB block may only be erased or written
when the RP# pin is at the specified boot block unlock
voltage (V

) or when the WP# pin is HIGH. During a

WRITE or ERASE of the boot block, the RP# pin must
be held at V

or the WP# pin held HIGH until the

WRITE or ERASE is completed. (The WP# pin does not
apply to the SOP package.) The V

pin must be at

PPH

(5V) when the boot block is written to or erased.

The MT28F800B5 and MT28F008B5 are available in

two configurations and top or bottom boot block. The
top boot block version supports processors of the x86
variety. The bottom boot block version is intended for
680X0 and RISC applications. Figure 1 illustrates the
memory address maps associated with these two ver-
sions.

Figure 1: Memory Address Maps

Bottom Boot

MT28F800B5/008B5xx-xxB

Top Boot

MT28F800B5/008B5xx-xxT

128KB Main Block

96KB Main Block

8KB Parameter Block

16KB Boot Block

BYTE ADDRESS

FFFFFh

E0000h

DFFFFh

C0000h

BFFFFh

A0000h

9FFFFh

80000h

7FFFFh

60000h

5FFFFh

40000h

3FFFFh

20000h

1FFFFh

08000h

07FFFh

06000h

05FFFh

04000h

03FFFh

00000h

7FFFFh

70000h

6FFFFh

60000h

5FFFFh

50000h

4FFFFh

40000h

3FFFFh

30000h

2FFFFh

20000h

1FFFFh

10000h

0FFFFh

04000h

03FFFh

03000h

02FFFh

02000h

01FFFh

00000h

WORD ADDRESS

FFFFFh

FC000h

FBFFFh

FA000h

F9FFFh

F8000h

F7FFFh

E0000h
DFFFFh

C0000h

BFFFFh

A0000h

9FFFFh

80000h

7FFFFh

60000h

5FFFFh

40000h

3FFFFh

20000h

1FFFFh

00000h

16KB Boot Block

8KB Parameter Block

96KB Main Block

128KB Main Block

BYTE ADDRESS

7FFFFh

7E000h
7DFFFh

7D000h

7CFFFh

7C000h

7BFFFh

70000h

6FFFFh

60000h

5FFFFh

50000h

4FFFFh

40000h

3FFFFh

30000h

2FFFFh

20000h

1FFFFh

10000h

0FFFFh

00000h

WORD ADDRESS

8Mb

SMART 5 BOOT BLOCK FLASH MEMORY

8Mb Smart 5 Boot Block Flash Memory

Micron Technology, Inc. Reserves the right to change products or specifications without notice.

MT28F800B5_3.fm - Rev. 3, Pub. 8/2002

Parameter Blocks

The two 8KB parameter blocks store less sensitive

and more frequently changing system parameters and
also may store configuration or diagnostic coding.
These blocks are enabled for erasure when the V

is at V

PPH

. No super-voltage unlock or WP# control is

required.

Main Memory Blocks

The eight remaining blocks are general-purpose

memory blocks and do not require a super-voltage on
RP# or WP# control to be erased or written. These
blocks are intended for code storage, ROM-resident
applications or operating systems that require in-sys-
tem update capability.

OUTPUT (READ) OPERATIONS

The MT28F800B5 and MT28F008B5 feature three

different types of READs. Depending on the current
mode of the device, a READ operation produces data
from the memory array, status register or device iden-
tification register. In each of these three cases, the
WE#, CE# and OE# inputs are controlled in a similar
manner. Moving between modes to perform a specific
READ is described in the Command Execution section.

Memory Array

To read the memory array, WE# must be HIGH, and

OE# and CE# must be LOW. Valid data is output on the
DQ pins when these conditions are met, and a valid
address is given. Valid data remains on the DQ pins
until the address changes, or OE# or CE# goes HIGH,
whichever occurs first. The DQ pins continue to out-
put new data after each address transition as long as
OE# and CE# remain LOW.

The MT28F800B5 features selectable bus widths.

When the memory array is accessed as a 512K x 16,
BYTE# is HIGH, and data is output on DQ0DQ15. To
access the memory array as a 1 Meg x 8, BYTE# must
be LOW, DQ8DQ14 are High-Z, and all data is output
on DQ0DQ7. The DQ15/(A-1) pin becomes the lowest
order address input so that 1,048,576 locations can be
read.

After power-up or RESET, the device is automati-

cally in the array read mode. All commands and their
operations are described in the Command Set and
Command Execution sections.

Status Register

Performing a READ of the status register requires

the same input sequencing as a READ of the array
except that the address inputs are "Don't Care." The
status register contents are always output on DQ0
DQ7, regardless of the condition of BYTE# on the
MT28F800B5. DQ8DQ15 are LOW when BYTE# is
HIGH, and DQ8DQ14 are High-Z when BYTE# is
LOW. Data from the status register is latched on the
falling edge of OE# or CE#, whichever occurs last. If the
contents of the status register change during a read of
the status register, either OE# or CE# may be toggled
while the other is held LOW to update the output.

Following a WRITE or ERASE, the device automati-

cally enters the status register read mode. In addition,
a READ during a WRITE or ERASE produces the status
register contents on DQ0DQ7. When the device is in
the erase suspend mode, a READ operation produces
the status register contents until another command is
issued. In certain other modes, READ STATUS REGIS-
TER may be given to return to the status register read
mode. All commands and their operations are
described in the Command Set and Command Execu-
tion sections.

Identification Register

A READ of the two 8-bit device identification regis-

ters requires the same input sequencing as a READ of
the array. WE# must be HIGH, and OE# and CE# must
be LOW. However, ID register data is output only on
DQ0DQ7, regardless of the condition of BYTE# on the
MT28F800B5. A0 is used to decode between the two
bytes of the device ID register; all other address inputs
are "Don't Care." When A0 is LOW, the manufacturer
compatibility ID is output, and when A0 is HIGH, the
device ID is output. DQ8DQ15 are High-Z when
BYTE# is LOW. When BYTE# is HIGH, DQ8DQ15 are
00h when the manufacturer compatibility ID is read
and 88h when the device ID is read.

To get to the identification register read mode,

READ IDENTIFICATION may be issued while the
device is in certain other modes. In addition, the iden-
tification register read mode can be reached by apply-
ing a super-voltage (V

) to the A9 pin. Using this

method, the ID register can be read while the device is
in any mode. When A9 is returned to V

or V

, the

device will return to the previous mode.

8Mb

SMART 5 BOOT BLOCK FLASH MEMORY

8Mb Smart 5 Boot Block Flash Memory

Micron Technology, Inc. Reserves the right to change products or specifications without notice.

MT28F800B5_3.fm - Rev. 3, Pub. 8/2002

INPUT OPERATIONS

The DQ pins are used either to input data to the

array or to input a command to the CEL. A command
input issues an 8-bit command to the CEL to control
the mode of operation of the device. A WRITE is used
to input data to the memory array. The following sec-
tion describes both types of inputs. More information
describing how to use the two types of inputs to write
or erase the device is provided in the Command Execu-
tion section.

Commands

To perform a command input, OE# must be HIGH,

and CE# and WE# must be LOW. Addresses are "Don't
Care" but must be held stable, except during an ERASE
CONFIRM (described in a later section). The 8-bit
command is input on DQ0DQ7, while DQ8DQ15 are
"Don't Care" on the MT28F800B5. The command is
latched on the rising edge of CE# (CE#-controlled) or
WE# (WE#-controlled), whichever occurs first. The
condition of BYTE# has no effect on a command input.

Memory Array

A WRITE to the memory array sets the desired bits

to logic 0s but cannot change a given bit to a logic 1
from a logic 0. Setting any bits to a logic 1 requires that
the entire block be erased. To perform a WRITE, OE#
must be HIGH, CE# and WE# must be LOW, and V

must be set to V

PPH

. Writing to the boot block also

requires that the RP# pin be at V

or WP# be HIGH.

A0A18 (A19) provide the address to be written, while
the data to be written to the array is input on the DQ
pins. The data and addresses are latched on the rising
edge of CE# (CE#-controlled) or WE# (WE#-con-
trolled), whichever occurs first. A WRITE must be pre-
ceded by a WRITE SETUP command. Details on how to
input data to the array are described in the Write
Sequence section.

Selectable bus sizing applies to WRITEs as it does to

READs on the MT28F800B5. When BYTE# is LOW (byte
mode), data is input on DQ0DQ7, DQ8DQ14 are
High-Z, and DQ15 becomes the lowest order address
input. When BYTE# is HIGH (word mode), data is
input on DQ0DQ15.

Table 1:

Command Set

COMMAND

HEX CODE

DESCRIPTION

RESERVED

00h

This command and all unlisted commands are invalid and should not be
called. These commands are reserved to allow for future feature
enhancements.

READ ARRAY

FFh

Must be issued after any other command cycle before the array can be read.
It is not necessary to issue this command after power-up or RESET.

IDENTIFY DEVICE

90h

Allows the device and manufacturer compatibility ID to be read. A0 is used
to decode between the manufacturer compatibility ID (A0 = LOW) and
device ID (A0 = HIGH).

READ STATUS REGISTER

70h

Allows the status register to be read. Please refer to Table 2 for more
information on the status register bits.

CLEAR STATUS REGISTER

50h

Clears status register bits 3-5, which cannot be cleared by the ISM.

ERASE SETUP

20h

The first command given in the two-cycle ERASE sequence. The ERASE is not
completed unless followed by ERASE CONFIRM.

ERASE CONFIRM/RESUME

D0h

The second command given in the two-cycle ERASE sequence. Must follow
an ERASE SETUP command to be valid. Also used during an ERASE SUSPEND
to resume the ERASE.

WRITE SETUP

40h or 10h

The first command given in the two-cycle WRITE sequence. The write data
and address are given in the following cycle to complete the WRITE.

ERASE SUSPEND

B0h

Requests a halt of the ERASE and puts the device into the erase suspend
mode. When the device is in this mode, only READ STATUS REGISTER, READ
ARRAY and ERASE RESUME commands may be executed.

8Mb

SMART 5 BOOT BLOCK FLASH MEMORY

8Mb Smart 5 Boot Block Flash Memory

Micron Technology, Inc. Reserves the right to change products or specifications without notice.

MT28F800B5_3.fm - Rev. 3, Pub. 8/2002

COMMAND SET

To simplify writing of the memory blocks, the

MT28F800B5 and MT28F008B5 incorporate an ISM
that controls all internal algorithms for writing and
erasing the floating gate memory cells. An 8-bit com-
mand set is used to control the device. Details on how
to sequence commands are provided in the Command
Execution section. Table 1 lists the valid commands.

ISM STATUS REGISTER

The 8-bit ISM status register (see Table 2) is polled

to check for WRITE or ERASE completion or any
related errors. During or following a WRITE, ERASE or
ERASE SUSPEND, a READ operation outputs the status
register contents on DQ0DQ7 without prior com-
mand. While the status register contents are read, the
outputs are not updated if there is a change in the ISM
status unless OE# or CE# is toggled. If the device is not

in the write, erase, erase suspend or status register read
mode, READ STATUS REGISTER (70h) can be issued to
view the status register contents.

All of the defined bits are set by the ISM, but only

the ISM and erase suspend status bits are reset by the
ISM. The erase, write and V

status bits must be

cleared using CLEAR STATUS REGISTER. If the V

sta-

tus bit (SR3) is set, the CEL does not allow further write
or erase operations until the status register is cleared.
This enables the user to choose when to poll and clear
the status register. For example, the host system may
perform multiple BYTE WRITE operations before
checking the status register instead of checking after
each individual WRITE. Asserting the RP# signal or
powering down the device also clears the status regis-
ter.

Table 2:

Status Register

STATUS

BIT #

STATUS REGISTER BIT

DESCRIPTION

SR7

ISM STATUS

1 = Ready

0 = Busy

The ISMS bit displays the active status of the state machine during
WRITE or BLOCK ERASE operations. The controlling logic polls this bit
to determine when the erase and write status bits are valid.

SR6

ERASE SUSPEND STATUS

1 = ERASE suspended

0 = ERASE in progress/completed

Issuing an ERASE SUSPEND places the ISM in the suspend mode and
sets this and the ISMS bit to "1." The ESS bit remains "1" until an
ERASE RESUME is issued.

SR5

ERASE STATUS

1 = BLOCK ERASE error

0 = Successful BLOCK ERASE

ES is set to "1" after the maximum number of ERASE cycles is executed
by the ISM without a successful verify. ES is only cleared by a CLEAR
STATUS REGISTER command or after a RESET.

SR4

WRITE STATUS

1 = WORD/BYTE WRITE error

0 = Successful WORD/BYTE WRITE

WS is set to "1" after the maximum number of WRITE cycles is
executed by the ISM without a successful verify. WS is only cleared by a
CLEAR STATUS REGISTER command or after a RESET.

SR3

STATUS

1 = No V

voltage detected

0 = V

present

S detects the presence of a V

voltage. It does not monitor V

continuously, nor does it indicate a valid V

voltage. The V

pin is

sampled for 5V after WRITE or ERASE CONFIRM is given. V

S must be

cleared by CLEAR STATUS REGISTER or by a RESET.

SR0-2

RESERVED

Reserved for future use.

8Mb

SMART 5 BOOT BLOCK FLASH MEMORY

8Mb Smart 5 Boot Block Flash Memory

Micron Technology, Inc. Reserves the right to change products or specifications without notice.

MT28F800B5_3.fm - Rev. 3, Pub. 8/2002

COMMAND EXECUTION

Commands are issued to bring the device into dif-

ferent operational modes. Each mode allows specific
operations to be performed. Several modes require a
sequence of commands to be written before they are
reached. The following section describes the proper-
ties of each mode, and Table 3 lists all command
sequences required to perform the desired operation.

Read Array

The array read mode is the initial state of the device

upon power-up and after a RESET. If the device is in
any other mode, READ ARRAY (FFh) must be given to
return to the array read mode. Unlike the WRITE
SETUP command (40h), READ ARRAY does not need
to be given before each individual read access.

IDENTIFY DEVICE

IDENTIFY DEVICE (90h) may be written to the CEL

to enter the identify device mode. While the device is
in this mode, any READ produces the device ID when
A0 is HIGH and the manufacturer compatibility ID
when A0 is LOW. The device remains in this mode until
another command is given.

Write Sequence

Two consecutive cycles are needed to input data to

the array. WRITE SETUP (40h or 10h) is given in the

first cycle. The next cycle is the WRITE, during which
the write address and data are issued and V

brought to V

PPH

. Writing to the boot block also

requires that the RP# pin be brought to V

or the WP#

pin be brought HIGH at the same time V

is brought

to V

PPH

. The ISM now begins to write the word or byte.

must be held at V

PPH

until the write is completed

(SR7 = 1).

While the ISM executes the WRITE, the ISM status

bit (SR7) is at "0," and the device does not respond to
any commands. Any READ operation produces the
status register contents on DQ0DQ7. When the ISM
status bit (SR7) is set to a logic 1, the WRITE has been
completed, and the device enters status register read
mode until another command is given.

After the ISM has initiated the WRITE, it cannot be

aborted except by a RESET or by powering down the
part. Doing either during a WRITE corrupts the data
being written. If only the WRITE SETUP command has
been given, the WRITE may be nullified by performing
a null WRITE. To execute a null WRITE, FFh must be
written when BYTE# is LOW, or FFFFh must be written
when BYTE# is HIGH. When the ISM status bit (SR7)
has been set, the device is in the status register read
mode until another command is issued.

Notes: 1. Must follow WRITE or ERASE CONFIRM commands to the CEL to enable Flash array READ cycles.

2. IA = Identify Address: 00h for manufacturer compatibility ID; 01h for device ID.
3. ID = Identify Data.
4. SRD = Status Register Data.
5. BA = Block Address (A12A19).
6. Addresses are "Don't Care" in first cycle but must be held stable.
7. WA = Address to be written; WD = Data to be written to WA.

Table 3:

Command Sequences

COMMANDS

BUS

CYCLES

REQ'D

FIRST CYCLE

SECOND CYCLE

NOTES

OPERATION

ADDRESS

DATA OPERATION

ADDRESS

DATA

READ ARRAY

WRITE

FFh

IDENTIFY DEVICE

WRITE

90h

READ

2, 3

READ STATUS REGISTER

WRITE

70h

READ

SRD

CLEAR STATUS REGISTER

WRITE

50h

ERASE SETUP/CONFIRM

WRITE

20h

WRITE

D0h

5, 6

ERASE SUSPEND/RESUME

WRITE

B0h

WRITE

D0h

WRITE SETUP/WRITE

WRITE

40h

WRITE

6, 7

ALTERNATE WORD/BYTE
WRITE

WRITE

10h

WRITE

6, 7

8Mb

SMART 5 BOOT BLOCK FLASH MEMORY

8Mb Smart 5 Boot Block Flash Memory

Micron Technology, Inc. Reserves the right to change products or specifications without notice.

MT28F800B5_3.fm - Rev. 3, Pub. 8/2002

ERASE Sequence

Executing an ERASE sequence sets all bits within a

block to logic 1. The command sequence necessary to
execute an ERASE is similar to that of a WRITE. To pro-
vide added security against accidental block erasure,
two consecutive command cycles are required to ini-
tiate an erase of a block. In the first cycle, addresses are
"Don't Care," and ERASE SETUP (20h) is given. In the
second cycle, V

must be brought to V

PPH

, an address

within the block to be erased must be issued, and
ERASE CONFIRM (D0h) must be given. If a command
other than ERASE CONFIRM is given, the write and
erase status bits (SR4 and SR5) are set, and the device
is in the status register read mode.

After the ERASE CONFIRM (D0h) is issued, the ISM

starts the ERASE of the addressed block. Any READ
operation outputs the status register contents on
DQ0DQ7. V

must be held at V

PPH

until the ERASE is

completed (SR7 = 1). When the ERASE is completed,
the device is in the status register read mode until
another command is issued. Erasing the boot block
also requires that either the RP# pin be set to V

the WP# pin be held HIGH at the same time V

is set

to V

PPH

ERASE Suspension

The only command that may be issued while an

ERASE is in progress is ERASE SUSPEND. This com-
mand allows other commands to be executed while
pausing the ERASE in progress. When the device has
reached the erase suspend mode, the erase suspend
status bit (SR6) and ISM status bit (SR7) is set. The
device may now be given a READ ARRAY, ERASE
RESUME or READ STATUS REGISTER command. After
READ ARRAY has been issued, any location not within
the block being erased may be read. If ERASE RESUME
is issued before SR6 has been set, the device immedi-
ately proceeds with the ERASE in progress.

ERROR HANDLING

After the ISM status bit (SR7) has been set, the V

(SR3), write (SR4) and erase (SR5) status bits may be
checked. If one or a combination of these three bits
has been set, an error has occurred. The ISM cannot
reset these three bits. To clear these bits, CLEAR STA-
TUS REGISTER (50h) must be given. If the VPP status
bit (SR3) is set, further write or erase operations can-
not resume until the status register is cleared. Table 4
lists the combination of errors

Notes: 1. SR3SR5 must be cleared using CLEAR STATUS REGISTER.

Table 4:

Status Register Error Decode

STATUS BITS

ERROR DESCRIPTION

SR5

SR4

SR3

No errors

voltage error

WRITE error

WRITE error, V

voltage not valid at time of WRITE

ERASE error

ERASE error, V

voltage not valid at time of ERASE CONFIRM

Command sequencing error or WRITE/ERASE error

Command sequencing error, V

voltage error, with WRITE and ERASE errors

8Mb

SMART 5 BOOT BLOCK FLASH MEMORY

8Mb Smart 5 Boot Block Flash Memory

Micron Technology, Inc. Reserves the right to change products or specifications without notice.

MT28F800B5_3.fm - Rev. 3, Pub. 8/2002

WRITE/ERASE CYCLE ENDURANCE

The MT28F800B5 and MT28F008B5 are designed

and fabricated to meet advanced firmware storage
requirements. To ensure this level of reliability, V

must be at 5V ±10% during WRITE or ERASE cycles.
Due to process technology advances, 5V V

is optimal

for application and production programming.

POWER USAGE

The MT28F800B5 and MT28F008B5 offer several

power-saving features that may be utilized in the array
read mode to conserve power. Deep power-down
mode is enabled by bringing RP# LOW. Current draw
(I

) in this mode is a maximum of 20µA. When CE# is

HIGH, the device enters standby mode. In this mode,
maximum I

current is 130µA. If CE# is brought HIGH

during a WRITE or ERASE, the ISM continues to oper-
ate, and the device consumes the respective active
power until the write or erase is completed.

POWER-UP

The likelihood of unwanted WRITE or ERASE, oper-

ations is minimized because two consecutive cycles
are required to execute either operation. However, to
reset the ISM and to provide additional protection
while V

is ramping, one of the following conditions

must be met:

· RP# must be held LOW until V

is at valid func-

tional level; or

· CE# or WE# may be held HIGH and RP# must be

toggled from V

-GND-V

After a power-up or RESET, the status register is

reset, and the device enters the array read mode.

Figure 2:

Power-Up/Reset Timing Diagram

VALID

(5V)

Data

Address

UNDEFINED

Note 1

RP#

RWH

NOTE:

1. V

must be within the valid operating range before RP#

goes HIGH.

8Mb

SMART 5 BOOT BLOCK FLASH MEMORY

8Mb Smart 5 Boot Block Flash Memory

Micron Technology, Inc. Reserves the right to change products or specifications without notice.

MT28F800B5_3.fm - Rev. 3, Pub. 8/2002

SELF-TIMED WRITE SEQUENCE

(WORD OR BYTE WRITE)

COMPLETE WRITE

STATUS-CHECK SEQUENCE

Notes: 1. Sequence may be repeated for additional BYTE or WORD WRITEs.

2. Complete status check is not required. However, if SR3 = 1, further WRITEs are inhibited until the status register

is cleared.

3. Device will be in status register read mode. To return to the array read mode, the FFh command must be issued.
4. If SR3 is set during a WRITE or BLOCK ERASE attempt, CLEAR STATUS REGISTER must be issued before further

WRITE or ERASE operations are allowed by the CEL.

5. Status register bits 3-5 must be cleared using CLEAR STATUS REGISTER.

YES

WRITE 40h or 10h

= 5V

Start

WRITE Word or Byte

Address/Data

STATUS REGISTER

READ

SR7 = 1?

Complete Status
Check (optional)

WRITE Complete

Start (WRITE completed)

YES

SR4 = 0?

SR3 = 0?

YES

BYTE/WORD WRITE Error

WRITE Successful

V Error

4, 5

8Mb

SMART 5 BOOT BLOCK FLASH MEMORY

8Mb Smart 5 Boot Block Flash Memory

Micron Technology, Inc. Reserves the right to change products or specifications without notice.

MT28F800B5_3.fm - Rev. 3, Pub. 8/2002

SELF-TIMED BLOCK ERASE SEQUENCE

COMPLETE BLOCK ERASE

STATUS-CHECK SEQUENCE

Notes: 1. Sequence may be repeated to erase additional blocks.

2. Complete status check is not required. However, if SR3 = 1, further ERASEs are inhibited until the status register

is cleared.

3. To return to the array read mode, the FFh command must be issued.
4. Refer to the ERASE SUSPEND flowchart for more information.
5. If SR3 is set during a WRITE or BLOCK ERASE attempt, CLEAR STATUS REGISTER must be issued before further

WRITE or ERASE operations are allowed by the CEL.

6. Status register bits 3-5 must be cleared using CLEAR STATUS REGISTER.

YES

= 5V

Complete Status
Check (optional)

ERASE Complete

YES

Suspend ERASE?

STATUS REGISTER

READ

SR7 = 1?

WRITE 20h

Start

WRITE D0h,

Block Address

Suspend

Sequence

ERASE Resumed

ERASE

Busy

Start (ERASE completed)

YES

SR4, 5 = 1?

SR3 = 0?

YES

Command Sequence Error

SR5 = 0?

V Error

BLOCK ERASE Error

5, 6

ERASE Successful

8Mb

SMART 5 BOOT BLOCK FLASH MEMORY

8Mb Smart 5 Boot Block Flash Memory

Micron Technology, Inc. Reserves the right to change products or specifications without notice.

MT28F800B5_3.fm - Rev. 3, Pub. 8/2002

ABSOLUTE MAXIMUM RATINGS*

Voltage on V

Supply Relative to V

.... -0.5V

+6V**

Input Voltage Relative to V

................... -0.5V

+6V**

Voltage Relative

.....................-0.5V

+5.5V

RP# or A9 Pin Voltage Relative to Vss... -0.5V to +12.6V

Temperature Under Bias..........................-40ºC to +85ºC
Storage Temperature (plastic) ...............-55ºC to +125ºC
Power Dissipation ....................................................... 1W

*Stresses greater than those listed under "Absolute
Maximum Ratings" may cause permanent damage to
the device. This is a stress rating only, and functional
operation of the device at these or any other condi-
tions above those indicated in the operational sections
of this specification is not implied. Exposure to abso-
lute maximum rating conditions for extended periods
may affect reliability.
**V

, input and I/O pins may transition to -2V for

<20ns and V

+ 2V for <20ns.

Voltage may pulse to -2V for <20ns and 14V for <20ns.

Notes: 1. All voltages referenced to V

ELECTRICAL CHARACTERISTICS AND RECOMMENDED DC READ OPERATING
CONDITIONS

Commercial Temperature (0ºC

+70ºC) and Extended Temperature (-40ºC

+85ºC)

PARAMETER/CONDITION

SYMBOL

MIN

MAX

UNITS

NOTES

Supply Voltage

4.5

5.5

Input High (Logic 1) Voltage, all inputs

+ 0.5

Input Low (Logic 0) Voltage, all inputs

-0.5

0.8

Device Identification Voltage, A9

12.6

DC OPERATING CHARACTERISTICS

Commercial Temperature (0ºC

+70ºC) and Extended Temperature (-40ºC

+85ºC)

PARAMETER/CONDITION

SYMBOL

MIN

MAX

UNITS

NOTES

OUTPUT VOLTAGE LEVELS (TTL)
Output High Voltage (I

= -2.5mA)

Output Low Voltage (I

= 5.8mA)

2.4

0.50

OUTPUT VOLTAGE LEVELS (CMOS)
Output High Voltage (I

= -100µA)

- 0.4

INPUT LEAKAGE CURRENT
Any input (0V

); All other pins not under test = 0V

-1

µA

INPUT LEAKAGE CURRENT: V

INPUT

(10V

12.6V = V

)

500

µA

INPUT LEAKAGE CURRENT: RP# INPUT
(10V

RP#

12.6V = V

)

500

µA

OUTPUT LEAKAGE CURRENT
(D

OUT

is disabled; 0V

OUT

)

-10

µA

8Mb

SMART 5 BOOT BLOCK FLASH MEMORY

8Mb Smart 5 Boot Block Flash Memory

Micron Technology, Inc. Reserves the right to change products or specifications without notice.

MT28F800B5_3.fm - Rev. 3, Pub. 8/2002

Notes: 1. Vcc = MAX V

during Icc tests.

2. Icc is dependent on cycle rates.
3. Icc is dependent on output loading. Specified values are obtained with the outputs open.

CAPACITANCE

= +25ºC; f = 1 MHz)

PARAMETER/CONDITION

SYMBOL

MAX

UNITS

Input Capacitance

Output Capacitance

READ AND STANDBY CURRENT DRAIN

Commercial Temperature (0ºC

+70ºC) and Extended Temperature (-40ºC

+85ºC)

PARAMETER/CONDITION

SYMBOL

MAX

UNITS

NOTES

READ CURRENT: WORD-WIDE, TTL INPUT LEVELS

(CE# = V

; OE# = V

; f =

10 MHz; Other inputs = V

or V

; RP# = V

)

CC1

2, 3

READ CURRENT: WORD-WIDE, CMOS INPUT LEVELS
(CE#

0.2V; OE#

- 0.2V; f =

10 MHz; Other inputs

0.2V or

- 0.2V; RP#

- 0.2V)

CC2

2, 3

READ CURRENT: BYTE-WIDE, TTL INPUT LEVELS
(CE# = V

; OE# = V

; f =

10 MHz; Other inputs = V

or V

; RP# = V

)

CC3

2, 3

READ CURRENT: BYTE-WIDE, CMOS INPUT LEVELS
CE#

0.2V; OE#

- 0.2V; f =

10 MHz; Other inputs

0.2V or

0.2V; RP# = V

- 0.2V)

CC4

2, 3

STANDBY CURRENT: TTL INPUT LEVELS
V

power supply standby current (CE# = RP# = V

;

Other inputs = V

or V

)

CC5

STANDBY CURRENT: CMOS INPUT LEVELS
V

power supply standby current (CE# = RP# = V

- 0.2V)

CC6

130

µA

DEEP POWER-DOWN CURRENT: V

SUPPLY

(RP# = V

±0.2V)

CC8

µA

STANDBY OR READ CURRENT:
V

SUPPLY (V

5.5V)

PP1

±15

µA

DEEP POWER-DOWN CURRENT: V

SUPPLY

(RP# = V

±0.2V)

PP2

µA

8Mb

SMART 5 BOOT BLOCK FLASH MEMORY

8Mb Smart 5 Boot Block Flash Memory

Micron Technology, Inc. Reserves the right to change products or specifications without notice.

MT28F800B5_3.fm - Rev. 3, Pub. 8/2002

Notes: 1. OE# may be delayed by

ACE -

AOE after CE# falls before

ACE is affected.

READ TIMING PARAMETERS

ELECTRICAL CHARACTERISTICS AND RECOMMENDED AC OPERATING CONDITIONS

Commercial Temperature (0ºC

+70ºC) and Extended Temperature (-40ºC

+85ºC); V

= +5V ±10%

AC CHARACTERISTICS

-8/-8 ET

PARAMETER

SYMBOL

MIN

MAX

UNITS

NOTES

Read cycle time

Access time from CE#

ACE

Access time from OE#

AOE

Access time from address

RP# HIGH to output valid delay

RWH

1,000

OE# or CE# HIGH to output in High-Z

Output hold time from OE#, CE# or address change

RP# LOW pulse width

8Mb

SMART 5 BOOT BLOCK FLASH MEMORY

8Mb Smart 5 Boot Block Flash Memory

Micron Technology, Inc. Reserves the right to change products or specifications without notice.

MT28F800B5_3.fm - Rev. 3, Pub. 8/2002

AC TEST CONDITIONS

Input pulse levels ...................................... 0.4V to 2.4V
Input rise and fall times.......................................<10ns
Input timing reference level .................... 0.8V and 2V
Output timing reference level ................. 0.8V and 2V
Output load........................1 TTL gate and C

= 100pF

WORD-WIDE READ CYCLE

TIMING PARAMETERS

Commercial Temperature (0ºC

+70ºC)

Extended Temperature (-40ºC

+85ºC)

Notes: 1. BYTE# = HIGH (MT28F800B5 only).

SYMBOL

-8/-8 ET

UNITS

SYMBOL

-8/-8 ET

UNITS

MIN

MAX

MIN

MAX

RWH

1,000

ACE

AOE

VALID DATA

VALID ADDRESS

CE#

A0A18/(A19)

OE#

DQ0DQ15

tRC

tACE

tAOE

tOD

tOH

tAA

WE#

RP#

tRWH

DON'T CARE

UNDEFINED

8Mb

SMART 5 BOOT BLOCK FLASH MEMORY

8Mb Smart 5 Boot Block Flash Memory

Micron Technology, Inc. Reserves the right to change products or specifications without notice.

MT28F800B5_3.fm - Rev. 3, Pub. 8/2002

Notes: 1. WRITE operations are tested at V

voltages equal to or less than the previous erase.

2. Absolute WRITE/ERASE protection when V

PPLK

3. When 5V V

and V

are used, V

cannot exceed V

by more than 500mV during WRITE and ERASE

operations.

4. Applies to MT28F800B5 only.
5. Applies to MT28F008B5 and MT28F800B5 with BYTE# = LOW.
6. Parameter is specified when device is not accessed. Actual current draw will be Icc

plus read current if a READ

is executed while the device is in erase suspend mode.

RECOMMENDED DC WRITE/ERASE CONDITIONS

Commercial Temperature (0ºC

+70ºC) and Extended Temperature (-40ºC

+85ºC); V

= +5V ±10%

PARAMETER/CONDITION

SYMBOL

MIN

MAX

UNITS

NOTES

WRITE/ERASE lockout voltage

PPLK

1.5

voltage during WRITE/ERASE operation

PPH

4.5

5.5

Boot block unlock voltage

12.6

WRITE/ERASE lockout voltage

LKO

WRITE/ERASE CURRENT DRAIN

Commercial Temperature (0ºC

+70ºC) and Extended Temperature (-40ºC

+85ºC); V

= +5V ±10%

PARAMETER/CONDITION

SYMBOL

MAX

UNITS

NOTES

WORD WRITE CURRENT: V

SUPPLY

WORD WRITE CURRENT: V

SUPPLY

BYTE WRITE CURRENT: V

SUPPLY

BYTE WRITE CURRENT: V

SUPPLY

ERASE CURRENT: V

SUPPLY

ERASE CURRENT: V

SUPPLY

ERASE SUSPEND CURRENT: V

SUPPLY

(ERASE suspended)

ERASE SUSPEND CURRENT: V

SUPPLY

(ERASE suspended)

200

µA

8Mb

SMART 5 BOOT BLOCK FLASH MEMORY

8Mb Smart 5 Boot Block Flash Memory

Micron Technology, Inc. Reserves the right to change products or specifications without notice.

MT28F800B5_3.fm - Rev. 3, Pub. 8/2002

Notes: 1. Measured with V

= V

PPH

= 5V.

2. RP# should be held at V

WP# held HIGH until boot block WRITE or ERASE is complete.

3. Polling status register before

WB is met may falsely indicate WRITE or ERASE completion.

4. WRITE/ERASE times are measured to valid status register data (SR7 = 1).
5.

REL is required to relock boot block after WRITE or ERASE to boot block.

6. Typical values measured at T

= +25ºC.

7. Assumes no system overhead.
8. Typical WRITE times use checkerboard data pattern.

SPEED-DEPENDENT WRITE/ERASE AC TIMING CHARACTERISTICS AND
RECOMMENDED AC OPERATING CONDITIONS: WE#- (CE#-)CONTROLLED WRITES

Commercial Temperature (0ºC

+70ºC) and Extended Temperature (-40ºC

+85ºC); V

= +5V ±10%

AC CHARACTERISTICS

-8/-8 ET

PARAMETER

SYMBOL

MIN

MAX

UNITS

NOTES

WRITE cycle time

WE# (CE#) HIGH pulse width

WPH (

CPH)

WE# (CE#) pulse width

WP (

CP)

Address setup time to WE# (CE#) HIGH

Address hold time from WE# (CE#) HIGH

Data setup time to WE# (CE#) HIGH

Data hold time from WE# (CE#) HIGH

CE# (WE#) setup time to WE# (CE#) LOW

CS (

WS)

CE# (WE#) hold time from WE# (CE#) HIGH

CH (

WH)

setup time to WE# (CE#) HIGH

VPS1

200

RP# HIGH to WE# (CE#) LOW delay

1,000

RP# at V

or WP# HIGH setup time to WE# (CE#) HIGH

RHS

100

WRITE duration (WORD or BYTE WRITE)

WED1

4.5

µs

Boot BLOCK ERASE duration

WED2

100

Parameter BLOCK ERASE duration

WED3

100

Main BLOCK ERASE duration

WED4

500

WE# (CE#) HIGH to busy status (SR7 = 0)

200

hold time from status data valid

VPH

RP# at V

or WP# HIGH hold time from status data valid

RHH

Boot block relock delay time

REL

100

WORD/BYTE WRITE AND ERASE DURATION CHARACTERISTICS

PARAMETER

TYP

MAX

UNITS

NOTES

Boot/parameter BLOCK ERASE time

0.5

Main BLOCK ERASE time

1.5

Main BLOCK WRITE time (byte mode)

6, 7, 8

Main BLOCK WRITE time (word mode)

6, 7, 8

8Mb

SMART 5 BOOT BLOCK FLASH MEMORY

8Mb Smart 5 Boot Block Flash Memory

Micron Technology, Inc. Reserves the right to change products or specifications without notice.

MT28F800B5_3.fm - Rev. 3, Pub. 8/2002

WRITE/ERASE CYCLE

WE#-CONTROLLED WRITE/ERASE

TIMING PARAMETERS

Commercial Temperature (0ºC

+70ºC)

Extended Temperature (-40ºC

+85ºC)

Notes: 1. Address inputs are "Don't Care" but must be held stable.

2. If BYTE# is LOW, data and command are 8-bit. If BYTE# is HIGH, data is 16-bit and command is 8-bit.
3. Either RP# at

or WP# HIGH unlocks the boot block.

SYMBOL

-8/-8 ET

UNITS

SYMBOL

-8/-8 ET

UNITS

MIN

MAX

MIN

MAX

1,000

WPH

RHS

100

WED1

4.5

µs

WED2

100

WED3

100

WED4

500

200

VPH

RHH

VPS1

200

DON'T CARE

tWC

tWED1/2/3/4

tRS

Status

(SR7=1)

tCH

tCS

[Unlock boot block]

tRHS

tVPH

tAS

tAH

tWP

tWPH

tDS

tDH

CMD

tRHH

CMD/

Data-in

CMD

WRITE SETUP or

ERASE SETUP input

WRITE or ERASE (block)

address asserted, and

WRITE data or ERASE

CONFIRM issued

WRITE or ERASE

executed, status register

checked for completion

Command for next

operation issued

tDH

tDS

[Unlock boot block]

tVPS1

Note 1

tAS

tAH

Status

(SR7=0)

tWB

CE#

A0A18/(A19)

OE#

DQ0DQ7/

DQ0DQ15

WE#

RP#

PPH1

WP#

[5V V

]

8Mb

SMART 5 BOOT BLOCK FLASH MEMORY

8Mb Smart 5 Boot Block Flash Memory

Micron Technology, Inc. Reserves the right to change products or specifications without notice.

MT28F800B5_3.fm - Rev. 3, Pub. 8/2002

WRITE/ERASE CYCLE

CE#-CONTROLLED WRITE/ERASE

TIMING PARAMETERS

Commercial Temperature (0ºC

+70ºC)

Extended Temperature (-40ºC

+85ºC)

Notes: 1. Address inputs are "Don't Care" but must be held stable.

2. If BYTE# is LOW, data and command are 8-bit. If BYTE# is HIGH, data is 16-bit and command is 8-bit.
3. Either RP# at V

or WP# HIGH unlocks the boot block.

SYMBOL

-8/-8 ET

UNITS

SYMBOL

-8/-8 ET

UNITS

MIN

MAX

MIN

MAX

1,000

WPH

RHS

100

WED1

4.5

µs

WED2

100

WED3

100

WED4

500

200

VPH

RHH

VPS1

200

DON'T CARE

tWC

tWED1/2/3/4

tRS

Status

(SR7=1)

tWH

tWS

[Unlock boot block]

tRHS

tVPH

tAS

tAH

tCP

tCPH

tDS

tDH

CMD

tRHH

CMD/

Data-in

CMD

WRITE SETUP or

ERASE SETUP input

WRITE or ERASE (block)

address asserted, and

WRITE data or ERASE

CONFIRM issued

WRITE or ERASE

executed, status register

checked for completion

Command for next

operation issued

tDH

tDS

[Unlock boot block]

tVPS1

Note 1

tAS

tAH

Status

(SR7=0)

tWB

WE#

A0A18/(A19)

OE#

DQ0DQ7/

DQ0DQ15

CE#

RP#

PPH1

WP#

[5V V

]

8Mb

SMART 5 BOOT BLOCK FLASH MEMORY

8Mb Smart 5 Boot Block Flash Memory

Micron Technology, Inc. Reserves the right to change products or specifications without notice.

MT28F800B5_3.fm - Rev. 3, Pub. 8/2002

44-PIN PLASTIC SOP

(600 Mil)

Notes: 1. Contact factory for availability

2. All dimensions in millimeters MAX/MIN or typical where noted.
3. Package width and length do not include mold protrusion; allowable mold protrusion is 0.1" per side.

DATA SHEET DESIGNATION

No Marking This data sheet contains minimum and maximum limits specified over the complete power supply

and temperature range for production devices. Although considered final, these specifications are
subject to change, as further product development and data characterization sometimes occur.

.016 (0.40)

.010 (0.25)

.066 (1.72)

.020 (0.50)

.015 (0.38)

.007 (0.18)

.005 (0.13)

.004 (0.10)

.643 (16.34)

.620 (15.74)

DETAIL A

PIN #1 INDEX

(ROTATED 90 CW)

SEE DETAIL A

GAGE PLANE

.0315 (0.80)

1.113 (28.27)

1.107 (28.12)

.010 (0.25)

.499 (12.68)

.493 (12.52)

.030 (0.76)

.106 (2.70) MAX

.050 (1.27)

TYP

8000 S. Federal Way, P.O. Box 6, Boise, ID 83707-0006, Tel: 208-368-3900

E-mail: prodmktg@micron.com, Internet: http://www.micron.com, Customer Comment Line: 800-932-4992

Micron and the Micron and M logos are trademarks and/or service marks of Micron Technology, Inc.

8Mb

SMART 5 BOOT BLOCK FLASH MEMORY

8Mb Smart 5 Boot Block Flash Memory

Micron Technology, Inc. Reserves the right to change products or specifications without notice.

MT28F800B5_3.fm - Rev. 3, Pub. 8/2002

REVISION HISTORY

Rev. 3, ...............................................................................................................................................................................8/02
· Removed PRELIMINARY designation
· Changed

RS from 600ns (MIN) to 1,000ns (MIN)

· Changed V

from 0.45V (MAX) to 0.50V (MAX)

Rev. 2, PRELIMINARY....................................................................................................................................................12/01
· Updated input capacitance specification
· Updated

RWH specification

Original document, PRELIMINARY, Rev. 1....................................................................................................................7/01

Part Number MT28F800B5

Document Outline